On Saturday, September 21, 2019 3:14:12 PM CEST MAILIST wrote: > exim should also be considered. We have been using exim with CentOS > for at least 10 years. Right. I've been using exim for over 20 years and haven't had any issues with it. Exims documentation is outstanding and the mailing list is great. For IMAP, you want cyrus.